IB DP Chemistry: HL复习笔记9.1.6 The Activity Series
The Activity Series Metals can be ranked in order of reactivity -this is called the reactivity series or just activity series Metals higher in reactivity can displace less reactive metals from thei...
IB DP Chemistry: HL复习笔记9.1.5 Half Equations
Half Equations Oxidation numbers can be used to balance chemical equations Go through these steps to balance a redox equation: Write the unbalanced equation and identify the atoms which change in o...
IB DP Chemistry: HL复习笔记9.1.4 Naming Transition Metal Compounds
Naming Transition Metal Compounds Transition metals are characterized by having variable oxidation numbers. Oxidation numbers can be used in the names of compounds to indicate which oxidation numbe...
IB DP Chemistry: HL复习笔记9.1.3 Oxidizing & Reducing agents
Oxidizing & Reducing Agents Oxidising agent An oxidising agent is a substance that oxidises another atom or ion by causing it to lose electrons An oxidising agent itself gets reduced – gains el...
美国高校发布CS录取新政！UMich、UIUC官宣CS直录新政策
或许每个留学生身边都有这样一位同学：不是在学CS的路上就是在转CS的路上... 火到商科都得让步的计算机专业，在留学圈有多“红”呢？——不止中国留学生热衷，全世界的优秀高中生们都“挤破了头”想进CS名校。 但是正因...
IB DP Chemistry: HL复习笔记9.1.2 Deducing Oxidation Numbers
Deducing Oxidation Numbers The oxidation numbers of all other atoms in their compounds can vary By following the oxidation number rules, the oxidation number of any atom in a compound or ion can be...
IB DP Chemistry: HL复习笔记9.1.1 Oxidation & reduction
Oxidation & Reduction There are three definitions of oxidation and reduction used in different branches of chemistry Oxidation and reduction can be used to describe any of the following proces...
IB DP Chemistry: HL复习笔记8.3.3 Reducing Sulfur Oxide Emissions
Reducing Sulfur Oxide Emissions The removal of sulfur from fossil fuels can either take place pre-combustion or post-combustion The oxides of sulfur, SO2 and SO3, are both acidic and toxic gases S...
IB DP Chemistry: HL复习笔记8.3.2 Effects of Acid Deposition
Effects of acid deposition Effect on materials Acid deposition can react with metals and rocks (such as limestone) causing buildings and statues to get damaged The impact of acid deposition can be ...
2022年A-Level秋季重考指南！
夏季大考即将放榜。但是如果放榜后，对自己的成绩不满意，也不用就此摆烂，下半年的A-Level考试还可以选择重考，通过参加秋季考试来刷新成绩。 那么，重考对于申请是否有影响？重考有什么规则？接下来，带大家来...
IB DP Chemistry: HL复习笔记8.3.1 Acid Deposition
Acid Deposition What is acid deposition? Rain is naturally acidic because of dissolved CO2 which forms carbonic acid H2O (l) + CO2 (g) ⇌ H2CO3 (aq) Carbonic acid is a weak acid and dissociates in...
2023美本申请系统要求更新！支持CA系统申请的大学进一步增加！
近期，多所大学录取更新申请信息，不少大学更新了2022-2023的申请系统要求，支持Common App系统。今天小编就跟大家分享一下几所重要大学的申请系统更新。 1、华大西雅图改用Common App 2、德州奥斯汀启用Common A...
